Friction-clutch.



No. 693,507. Patented Feb. la, |902.

G. H. FABMAN.

FRICTIN CLUTCH.

plication filed June 7, 1901.)

(No Modl'.)

i ill L9 ,t 1;.

www.nnnmmlmumlw f No. 693,507. Patented Fen. la, |902. G. H. FAHMAN.

FRICTIUN CLUTCH.

(Application iled June '7, 1901.) (No Model.)

2 Sheets-Sheet 2.

THE Non ns vsvsns co to n c rrr GUY II. FARMAN, OF DENVER, COLORADO.

FRICTION-CLUTCH.

SEECIFIGATION forming part of Letters Patent No. 693,507, dated February18, 1902.

Serial Nol 63,621. (No model.)

To all whom, it may concern:

Be it known that I, GUY II. FARMAN, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Oolorado,have invented certain new and useful Improvements in Friction-Clutches;and I do hereby declare the followingto be a full, clear, and exactdescription of the invention, such as will enable others skilled in theartto which it appertains to make and use the same, reference being hadto the accompanying drawings, and to iigures of reference marked thereon, which form a part of this specification.

My invention relates to friction-clutches7 and more particularly to thatclass of clutches in which a lever operates a shoe arranged to engagethe flange of a friction-wheel and is designed to impart an intermittentrotary motion to the wheel by reason of substantially reciprocatingmotion imparted to the end of the lever. The shaft to which the wheel issecured may have a gear, a worm, or any other mechanical equivalent fordriving a moving part.

The device is simple, efcient, and cheap.

Referring to the drawings, in which like parts are similarly designated,Figure l shows a plan View of my device, partly in section. Fig. 2 isafront elevation showing the clutchwheel broken away to expose theoperative parts. Fig. 3 is an elevation, and Fig. 4: a plan, partly insection, showing the shoe on the outer periphery of the wheel-rim.

The wheel et is secured to a shaft 5, which shaft is held in a bearing6, bolted to a suitable part, here shown as a Wooden post '7. Looselymounted on the shaft 5 is an arm 8, provided with an oiset 9. In theouter or offset portion 9 is jonrnaled a stub-shaft 1l, keyed to or madeintegral with a lever-arm 10, and on this stub-shaft is a smaller one12, eccentric thereto, that performs the function of a cam. On thiseccentric portion or cam is carried shoe 13, which engages the rim ofthe brake-wheel. This shoe is formed with a clutching-face le of acurvature to correspond with that of the wheel-rim and a rear orstopping face 15, here shown as straight, said face 15 arranged to becammed against the complementary face 16, that forms the oset 9 of thepiece 8. I have here shown the complementary faces 15 and 16 between theshoe and part 9 as straight; but they may be made of any shape desiredto accomplish the desired result-namely, to prevent the leverarm 10 fromrotating around its pivot when being moved down, so that said arm 10will be locked during this movement by the shoe to the arm 8, so thatboth of them will move down as a unit to perform the double function ofreleasing the shoe from the wheel and positively rotate the arm 8 in adirection preparatory to taking a new hold on the wheel.

The operation will be as follows: All the parts being movable, when thelever 10 is depressed the eccentric 12 will be rotated toward the centerof the Wheel and cam the straight face l5 of the shoe against thestraight face 16 on the part 8, thus locking the shoe, the lever, andthe part 8 rigidly together, and they will move as a unit around theshaft 5 as a common axis of rotation clear of the rim of the wheel. Whenthe lever l0 is lifted, the shoe 13 will be cammed against the rim ofthe wheel and its clutching-face held thereto, and the wheel, shoe,lever, and piece 9 will be rotated in the opposite direction as a unit.In this manner a step-bystep rotation can be imparted to the wheel tooperate a moving element. Should it be desirable to use this simply as africtionbrake for stopping the rotating of shaft 5, the constructionwill be equally applicable.

It will not be absolutely necessary that the part 8 have its center ofrotation coincident with that of the Wheel when used only to stop therotation of the shaft secured to said wheel. The part 8 can of course beextended beyond the Wheel-rim, the offset suitably located, and the shoe13 provided with a concave face and arranged to be cammed against theouter surface of the Wheel-rim, as shown in Figs. 3 and 4, the operationbeing identical with that just described.

.Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

1. In combination, a Wheel, an arm journaled to rotate about a point, alever, a stubshaft thereon and journaled in one end of said arm, a camsecured to the stub-shaft and a shoe on said cam, whereby when said IOOlever is rotated with respect to the arm, the shoe is moved to or fromsaid Wheel, substantially as described.

2. In combination, a wheel, an arm jour naled at one end to rotate abouta point and provided with an offset, a lever, a stub-shaft thereonjournaled in the other end of said arm, a cam on the stub-shaft and ashoe on the cam, whereby the rotation of said lever in one directionWill cam the shoe against the Wheel and in the other direction againstthe offset, substantially as described.

3. In combination, a Wheel having a suitable rim, a shaft secured to theWheel, an arm journaled at one end on said shaft and provided With anoffset, a lever provided with a stub-shaft journaled in the other end ofsaid arm, a cam on the stub-shaft, a shoe on the cam having a convexengaging face adapted to engage the inner periphery of the Wheelrim,whereby when the lever is moved in one direction will cam lthe shoeagainst the inner periphery of the wheel-rim and when moved in anopposite direction cam the shoe against the offset, substantially asdescribed.

4. In combination, an operating-shaft, a Wheel secured thereto, an armloose on the shaft with an offset, a lever provided with a stub-shaftjournaled in the free end of said GUY H. FARMAN.

Witnesses:

DAVID LLOYD, F. G. ROBERTS.

